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Millennium

Reference Data Operations Specialist

Miami, United States

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Job details

Apply by: May 11, 2027
Experience: 5–7+ years of experience in financial services, ideally in operations at a broker-dealer or asset management firm, with some experience in Security Master or reference data
Posting language: English
Posted: Nov 12, 2026

Original job description

Reference Data Operations Specialist

About Millennium Millennium is a global, diversified alternative investment firm, founded in 1989. Defined by evolution, innovation and focus, Millennium’s mission is to deliver results for our investors.

Our people are empowered with both independence and support: the autonomy to pursue ideas with conviction and the backing of a global network committed to collaboration, disciplined risk management and continuous learning. With opportunities to deepen expertise and accelerate development, talent at Millennium is equipped to adapt, evolve and build lasting impact over time. Discover how transformative growth accelerates impact.

Meet the Team Operations & Middle Office is one of the largest groups at Millennium. The Data Operations team sits within the Control function and oversees the firm’s Global Security Master through a range of data quality measures. The team also manages the processes that onboard new securities and attributes.

What You’ll Do

Ensure the accurate creation and maintenance of all tradable securities in Millennium’s Global Security Master
Oversee data quality control checks through system and business validations
Monitor corporate actions and market data events to proactively ensure processing and avoid disruptions to downstream interfaces
Liaise with internal front, middle, and back office clients and external data vendors to resolve ad hoc issues
Partner with Development on requirements and help design and implement new processes and workflows that improve the Security Master for firm stakeholders

What You Bring

5–7+ years of experience in financial services, ideally in operations at a broker-dealer or asset management firm, with some experience in Security Master or reference data
Strong knowledge of financial instruments, including equities, fixed income, and derivatives
Experience working with Bloomberg, Refinitiv, Markit (S&P Global), ICE, and other data vendors
Ability to implement and maintain new systems, procedures, and controls
Solid understanding of basic SQL queries and proficiency in Microsoft Excel
Strong communication and interpersonal skills, with experience supporting senior stakeholders
Ability to meet deadlines and work well in a team environment
Self-directed, diligent problem solver with a desire to contribute to Millennium’s reputation and success

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Jobs in the United States